Suppose two chemical reactions are linked together in a way that the O2 produced in the first reaction goes on to react completely with Mg to form MgO in the second reaction. Reaction one: 2 KClO3 → 3 O2 + 2 KCl Reaction two: 2 Mg + O2 → 2 MgO If you start with 4 moles of KClO3, how many moles of MgO could eventually form

Numbe of mole of MgO form=12

Explanation:

First calculate the number of mole of produced from 4 mole of  

Balance the first reaction:

from the above balanced reaction it is clearly that,

by unitry method,

2 mole of produced 3 mole of

1 mole of produced 1.5 mole of

from 4 mole of   mole of produced

hence we have 6 mole of and this total oxygen will react with Mg

Balance the second reaction:

since produced oxygen in first reaction is reacted completely with Mg means Mg is given in excess quantity,

From the second balanced reacion it is clearly that,

1 mole of produced 2 Mole of MgO

hence 6 mole of will produce 12 mole of MgO

Numbe of mole of MgO form=12

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.